From "Yu Yu Hakusho: Ghost Files: Power Between the Teeth (#1.87)"
] If only I could rearrange the gears turning in your head! I don't want to use this on you! Please, return to the Sensui you were!
If there has ever been a human destined to be Spirit Detective, it was you. You were born with incredible powers, and an obsession for making things right and just. It was my fault; I was too eager to close the case. How could I not have known how you would react, when you saw the darkest vices of man? When you realized that your life's work of protecting humans from demons was not a crusade of pure justice, but a study in gray?